Four types of reactions (ΔG = ΔH - TΔS)?
1) heat is released and disorder is increased:always spontaneous (exergonic)
2) heat is released, but disorder decreases: onlyspontaneous below a certain temperature; e.g.denatured/native protein, lipid bilayer vs.individual lipidsThis reaction occurs only (-ΔG) if the heat releasedis greater than the increase in order.
3) heat is used, but disorder increases:spontaneous above a certain temperature; e.g.dissolving NaCl in water.
4) heat is used and disorder decreases: neverspontaneous (endergonic).Most anabolic reactions!